Kemp’s treachery had engaged Griffin. He felt cheated and humiliated. The breach of faith wasn’t tolerable. Moreover it was the power of the invisible man that he felt had been challenged. Hence he must have been in a very foul mood when he hit Wicksteed with iron rod. In addition to this Kemp advice to the police and country men to capture Griffin further irritated him. He somehow wanted to avenge himself and let the world know that he could let loose a reign of terror on his own. Wicksteed was on his way to have a lunch when he was intrigued to see an iron rod moving all by itself. This was Griffin who had pulled out the iron rod from a broken fence to use it as a weapon. Curiosity made the steward follow the rod. He struck it again and again with his walking stick. An already infuriated Griffin was provoked by this causing his death. Though he was absolutely harmless and innocent, Wicksteed became a victim of the wrath of the invisible man thus Kemp’s tracheary was responsible to a great extent in causing Wicksteed murder
